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Workflow in Blazor Kanban component

03 Aug 2021 / 10 minutes to read

Kanban workflow allows to set the flow of cards between the columns. It provides restriction on columns when the card is moved from one column to another column. It provides support to prevent the drag and drop action on the column.

Prevent transition across columns

Provides restriction on columns when performing drag and drop actions while providing the KeyField inside the TransitionColumns property.

If a card is dragged, dotted border line will be shown on the possible drop columns and the not-allowed cursor point will be shown in the restricted dropped columns.

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@using Syncfusion.Blazor.Kanban

<SfKanban TValue="TasksModel" KeyField="Status" DataSource="Tasks">
    <KanbanColumns>
        <KanbanColumn HeaderText="Backlog" KeyField="@(new List<string>() {"Open"})" TransitionColumns="@(new List<string>() {"InProgress"})"></KanbanColumn>
        <KanbanColumn HeaderText="In Progress" KeyField="@(new List<string>() {"InProgress"})" TransitionColumns="@(new List<string>() {"Testing"})"></KanbanColumn>
        <KanbanColumn HeaderText="Testing" KeyField="@(new List<string>() {"Testing"})" TransitionColumns="@(new List<string>() {"Close"})"></KanbanColumn>
        <KanbanColumn HeaderText="Done" KeyField="@(new List<string>() {"Close"})"></KanbanColumn>
    </KanbanColumns>
    <KanbanCardSettings HeaderField="Id" ContentField="Summary"></KanbanCardSettings>
</SfKanban>

@code {
    public class TasksModel
    {
        public string Id { get; set; }
        public string Title { get; set; }
        public string Status { get; set; }
        public string Summary { get; set; }
        public string Assignee { get; set; }
    }

    public List<TasksModel> Tasks = new List<TasksModel>()
{
        new TasksModel { Id = "Task 1", Title = "BLAZ-29001", Status = "Open", Summary = "Analyze the new requirements gathered from the customer.", Assignee = "Nancy Davloio" },
        new TasksModel { Id = "Task 2", Title = "BLAZ-29002", Status = "InProgress", Summary = "Improve application performance", Assignee = "Andrew Fuller" },
        new TasksModel { Id = "Task 3", Title = "BLAZ-29003", Status = "Open", Summary = "Arrange a web meeting with the customer to get new requirements.", Assignee = "Janet Leverling" },
        new TasksModel { Id = "Task 4", Title = "BLAZ-29004", Status = "InProgress", Summary = "Fix the issues reported in the IE browser.", Assignee = "Janet Leverling" },
        new TasksModel { Id = "Task 5", Title = "BLAZ-29005", Status = "Review", Summary = "Fix the issues reported by the customer.", Assignee = "Steven walker" },
        new TasksModel { Id = "Task 6", Title = "BLAZ-29006", Status = "Testing", Summary = "Fix the issues reported in Safari browser.", Assignee = "Nancy Davloio" },
        new TasksModel { Id = "Task 7", Title = "BLAZ-29007", Status = "Close", Summary = "Test the application in the IE browser.", Assignee = "Margaret hamilt" },
        new TasksModel { Id = "Task 8", Title = "BLAZ-29008", Status = "Testing", Summary = "Validate the issues reported by the customer.", Assignee = "Steven walker" },
        new TasksModel { Id = "Task 9", Title = "BLAZ-29009", Status = "Open", Summary = "Show the retrieved data from the server in grid control.", Assignee = "Margaret hamilt" },
        new TasksModel { Id = "Task 10", Title = "BLAZ-29010", Status = "InProgress", Summary = "Fix cannot open user’s default database SQL error.", Assignee = "Janet Leverling" }
    };
}

The output will be as follows.

transition

Prevent Drop actions

Column will not allow any dropped card action when you disable the AllowDrop properties in the column.

In the following code, the Backlog column will not allow any card drop action within the column and any other columns cards.

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@using Syncfusion.Blazor.Kanban

<SfKanban TValue="TasksModel" KeyField="Status" DataSource="Tasks">
    <KanbanColumns>
        <KanbanColumn HeaderText="Backlog" KeyField="@(new List<string>() {"Open"})" AllowDrop="false"></KanbanColumn>
        <KanbanColumn HeaderText="In Progress" KeyField="@(new List<string>() {"InProgress"})" TransitionColumns="@(new List<string>() {"Testing"})"></KanbanColumn>
        <KanbanColumn HeaderText="Testing" KeyField="@(new List<string>() {"Testing"})" TransitionColumns="@(new List<string>() {"Close"})"></KanbanColumn>
        <KanbanColumn HeaderText="Done" KeyField="@(new List<string>() {"Close"})"></KanbanColumn>
    </KanbanColumns>
    <KanbanCardSettings HeaderField="Id" ContentField="Summary"></KanbanCardSettings>
</SfKanban>

@code {
    public class TasksModel
    {
        public string Id { get; set; }
        public string Title { get; set; }
        public string Status { get; set; }
        public string Summary { get; set; }
        public string Assignee { get; set; }
    }

    public List<TasksModel> Tasks = new List<TasksModel>()
{
        new TasksModel { Id = "Task 1", Title = "BLAZ-29001", Status = "Open", Summary = "Analyze the new requirements gathered from the customer.", Assignee = "Nancy Davloio" },
        new TasksModel { Id = "Task 2", Title = "BLAZ-29002", Status = "InProgress", Summary = "Improve application performance", Assignee = "Andrew Fuller" },
        new TasksModel { Id = "Task 3", Title = "BLAZ-29003", Status = "Open", Summary = "Arrange a web meeting with the customer to get new requirements.", Assignee = "Janet Leverling" },
        new TasksModel { Id = "Task 4", Title = "BLAZ-29004", Status = "InProgress", Summary = "Fix the issues reported in the IE browser.", Assignee = "Janet Leverling" },
        new TasksModel { Id = "Task 5", Title = "BLAZ-29005", Status = "Review", Summary = "Fix the issues reported by the customer.", Assignee = "Steven walker" },
        new TasksModel { Id = "Task 6", Title = "BLAZ-29006", Status = "Testing", Summary = "Fix the issues reported in Safari browser.", Assignee = "Nancy Davloio" },
        new TasksModel { Id = "Task 7", Title = "BLAZ-29007", Status = "Close", Summary = "Test the application in the IE browser.", Assignee = "Margaret hamilt" },
        new TasksModel { Id = "Task 8", Title = "BLAZ-29008", Status = "Testing", Summary = "Validate the issues reported by the customer.", Assignee = "Steven walker" },
        new TasksModel { Id = "Task 9", Title = "BLAZ-29009", Status = "Open", Summary = "Show the retrieved data from the server in grid control.", Assignee = "Margaret hamilt" },
        new TasksModel { Id = "Task 10", Title = "BLAZ-29010", Status = "InProgress", Summary = "Fix cannot open user’s default database SQL error.", Assignee = "Janet Leverling" }
    };
}

The output will be as follows.

drop

Prevent Drag actions

Column will not allow any dragged card action when you disable the AllowDrag properties in the column.

In the following code, the Done column will not allow any card drag action within the column.

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@using Syncfusion.Blazor.Kanban

<SfKanban TValue="TasksModel" KeyField="Status" DataSource="Tasks">
    <KanbanColumns>
        <KanbanColumn HeaderText="Backlog" KeyField="@(new List<string>() {"Open"})" AllowDrop="false"></KanbanColumn>
        <KanbanColumn HeaderText="In Progress" KeyField="@(new List<string>() {"InProgress"})" TransitionColumns="@(new List<string>() {"Testing"})"></KanbanColumn>
        <KanbanColumn HeaderText="Testing" KeyField="@(new List<string>() {"Testing"})" TransitionColumns="@(new List<string>() {"Close"})"></KanbanColumn>
        <KanbanColumn HeaderText="Done" KeyField="@(new List<string>() {"Close"})" AllowDrag="false"></KanbanColumn>
    </KanbanColumns>
    <KanbanCardSettings HeaderField="Id" ContentField="Summary"></KanbanCardSettings>
    <KanbanSwimlaneSettings KeyField="Assignee"></KanbanSwimlaneSettings>
</SfKanban>

@code {
    public class TasksModel
    {
        public string Id { get; set; }
        public string Title { get; set; }
        public string Status { get; set; }
        public string Summary { get; set; }
        public string Assignee { get; set; }
        public string AssigneeName { get; set; }
    }

    public List<TasksModel> Tasks = new List<TasksModel>()
{
        new TasksModel { Id = "Task 1", Title = "BLAZ-29001", Status = "Open", Summary = "Analyze the new requirements gathered from the customer.", Assignee = "Nancy Davloio", AssigneeName = "Nancy" },
        new TasksModel { Id = "Task 2", Title = "BLAZ-29002", Status = "InProgress", Summary = "Improve application performance", Assignee = "Andrew Fuller", AssigneeName = "Andrew" },
        new TasksModel { Id = "Task 3", Title = "BLAZ-29003", Status = "Open", Summary = "Arrange a web meeting with the customer to get new requirements.", Assignee = "Janet Leverling", AssigneeName = "Janet" },
        new TasksModel { Id = "Task 4", Title = "BLAZ-29004", Status = "InProgress", Summary = "Fix the issues reported in the IE browser.", Assignee = "Janet Leverling", AssigneeName = "Janet" },
        new TasksModel { Id = "Task 5", Title = "BLAZ-29005", Status = "Review", Summary = "Fix the issues reported by the customer.", Assignee = "Steven walker", AssigneeName = "Steven" },
        new TasksModel { Id = "Task 6", Title = "BLAZ-29006", Status = "Review", Summary = "Fix the issues reported in Safari browser.", Assignee = "Nancy Davloio", AssigneeName = "Nancy" },
        new TasksModel { Id = "Task 7", Title = "BLAZ-29007", Status = "Close", Summary = "Test the application in the IE browser.", Assignee = "Margaret hamilt", AssigneeName = "Margaret" },
        new TasksModel { Id = "Task 8", Title = "BLAZ-29008", Status = "Validate", Summary = "Validate the issues reported by the customer.", Assignee = "Steven walker", AssigneeName = "Steven" },
        new TasksModel { Id = "Task 9", Title = "BLAZ-29009", Status = "Open", Summary = "Show the retrieved data from the server in grid control.", Assignee = "Margaret hamilt", AssigneeName = "Margaret" },
        new TasksModel { Id = "Task 10", Title = "BLAZ-29010", Status = "InProgress", Summary = "Fix cannot open user’s default database SQL error.", Assignee = "Janet Leverling", AssigneeName = "Janet" },
        new TasksModel { Id = "Task 11", Title = "BLAZ-29011", Status = "Review", Summary = "Fix the issues reported in data binding.", Assignee = "Janet Leverling", AssigneeName = "Janet" },
        new TasksModel { Id = "Task 12", Title = "BLAZ-29012", Status = "Close", Summary = "Analyze SQL server 2008 connection.", Assignee = "Andrew Fuller", AssigneeName = "Andrew" },
        new TasksModel { Id = "Task 13", Title = "BLAZ-29013", Status = "Validate", Summary = "Validate databinding issues.", Assignee = "Margaret hamilt", AssigneeName = "Margaret" },
        new TasksModel { Id = "Task 14", Title = "BLAZ-29014", Status = "Close", Summary = "Analyze grid control.", Assignee = "Margaret hamilt", AssigneeName = "Margaret" },
        new TasksModel { Id = "Task 15", Title = "BLAZ-29015", Status = "Close", Summary = "Stored procedure for initial data binding of the grid.", Assignee = "Steven walker", AssigneeName = "Steven" },
        new TasksModel { Id = "Task 16", Title = "BLAZ-29016", Status = "Close", Summary = "Analyze stored procedures.", Assignee = "Janet Leverling", AssigneeName = "Janet" },
        new TasksModel { Id = "Task 17", Title = "BLAZ-29017", Status = "Validate", Summary = "Validate editing issues.", Assignee = "Nancy Davloio", AssigneeName = "Nancy" },
        new TasksModel { Id = "Task 18", Title = "BLAZ-29018", Status = "Review", Summary = "Test editing functionality.", Assignee = "Nancy Davloio", AssigneeName = "Nancy" },
        new TasksModel { Id = "Task 19", Title = "BLAZ-29019", Status = "Open", Summary = "Enhance editing functionality.", Assignee = "Andrew Fuller", AssigneeName = "Andrew" },
        new TasksModel { Id = "Task 20", Title = "BLAZ-29020", Status = "InProgress", Summary = "Improve the performance of the editing functionality.", Assignee = "Nancy Davloio", AssigneeName = "Nancy" },
        new TasksModel { Id = "Task 21", Title = "BLAZ-29021", Status = "Open", Summary = "Arrange web meeting with the customer to show editing demo.", Assignee = "Steven walker", AssigneeName = "Steven" },
        new TasksModel { Id = "Task 22", Title = "BLAZ-29022", Status = "Review", Summary = "Fix the editing issues reported by the customer.", Assignee = "Janet Leverling", AssigneeName = "Janet" },
        new TasksModel { Id = "Task 23", Title = "BLAZ-29023", Status = "Testing", Summary = "Fix the issues reported by the customer.", Assignee = "Steven walker", AssigneeName = "Steven" },
        new TasksModel { Id = "Task 24", Title = "BLAZ-29024", Status = "Testing", Summary = "Fix the issues reported in Safari browser.", Assignee = "Nancy Davloio", AssigneeName = "Nancy" },
        new TasksModel { Id = "Task 25", Title = "BLAZ-29025", Status = "Testing", Summary = "Fix the issues reported in data binding.", Assignee = "Janet Leverling", AssigneeName = "Janet" },
        new TasksModel { Id = "Task 26", Title = "BLAZ-29026", Status = "Testing", Summary = "Test editing functionality.", Assignee = "Nancy Davloio", AssigneeName = "Nancy" },
        new TasksModel { Id = "Task 27", Title = "BLAZ-29027", Status = "Testing", Summary = "Test editing feature in the IE browser.", Assignee = "Janet Leverling", AssigneeName = "Janet" }
    };
}

The output will be as follows.

drag